CUL-01 Ultrasonic Speaker has 33 ultrasonic emitters to avoid unauthorized cell phones to 
record crucial and confidential information during meetings. It has unattractive appearance and 
is suitable to be placed in a room or can be portable to work because of its built-in battery inside. 
The best interfering microphone performance when CUL-01 emitters exactly face a phone’s 
speaker because the emitters affects the microphone directionally.  

Specification 
Ultrasonic emitters:33 pcs 
Dimension: 315mm×57mm×55mm 
Operation time with built-in battery:2.5hrs 
Remote control to turn on /off the device 
CUL-01 can interfere iphone’s speaker up to 2 meters 
when the emitters exactly face the phone’s speaker.